| Oftebro, Jakob | Jakob Oftebro (Jakob Oftebro) | Actor | 2006 - 2022 | 5 | |
| Olsen, Elisabeth | Elisabeth Olsen (Elisabeth Olsen) | Actor | 2006 | 1 | |
| Olsson, Tove | Tove Olsson (Tove Olsson) | Actor | 2008 | 10 | 2 |
| Opheim, Lea Basch | Lea Basch Opheim (Lea Basch Opheim) | Actor | 2009 - 2011 | 3 | |
| Oliversen, Stine | Stine Oliversen (Stine Oliversen) | Actor | 2009 | 1 | |
| Ofsdal, Sofie | Sofie Ofsdal (Sofie Ofsdal) | Actor | 2010 | 1 | |
| Olsen, Mathilde Arschim | Mathilde Arschim Olsen (Mathilde Arschim Olsen) | Actor | 2010 | 1 | |
| Olsen, Thea Arschim | Thea Arschim Olsen (Thea Arschim Olsen) | Actor | 2010 | 1 | |
| Opedal, Herman Ljung | Herman Ljung Opedal (Herman Ljung Opedal) | Actor | 2010 | 3 | |
| Olsen, Kim | Kim Olsen (Kim Olsen) | Actor | 2011 - 2019 | 2 | |
| Oborotov, Yuri | Yuri Oborotov (Yuri Oborotov) | Actor | 2012 | 2 | |
| Ottmar, Aurora Berentsen | Aurora Berentsen Ottmar (Aurora Berentsen Ottmar) | Actor | 2012 | 1 | |
| Olstad, Andrea | Andrea Olstad (Andrea Olstad) | Actor | 2012 | 2 | |
| Osvik, Erik Baltzek | Erik Baltzek Osvik (Erik Baltzek Osvik) | Actor | 2012 | 1 | |
| Offerdal, Sindre Strand | Sindre Strand Offerdal (Sindre Strand Offerdal) | Actor | 2012 - 2015 | 3 | |
| Oftedal, Stian | Stian Oftedal (Stian Oftedal) | Actor | 2012 | 2 | |
| Ordężanka, Janina | Janina Ordężanka (Janina Ordężanka) | Actor | 1911 | 1 | |
| Owenberg-Lyche, Ragnhild | Ragnhild Owenberg-Lyche (Ragnhild Owenberg-Lyche) | Actor | 1911 - 1922 | 6 | 6 |
| O'Connor, Kathleen | Kathleen O'Connor (Kathleen O'Connor) | Actor | 1912 | 1 | |
| Odstrčilová, Liběna | Liběna Odstrčilová (Liběna Odstrčilová) | Actor | 1913 - 1922 | 3 | |
| Ono, Shihoriko | Shihoriko Ono (Shihoriko Ono) | Actor | 1914 | 1 | |
| Ozols, Jānis | Jānis Ozols (Jānis Ozols) | Actor | 1915 | 2 | |
| Orford, Cathleen | Cathleen Orford (Cathleen Orford) | Actor | 1913 - 1918 | 4 | |
| Osis, K. | K. Osis (K. Osis) | Actor | 1916 | 1 | |
| Okornicka (Miłosz), Helena | Helena Okornicka (Miłosz) (Helena Okornicka (Miłosz)) | Actor | 1916 | 1 | |
| Olsen, Tonny | Tonny Olsen (Tonny Olsen) | Actor | 1918 - 1924 | 5 | |
| Ortega, - | - Ortega (- Ortega) | Actor | 1919 | 1 | |
| Olin, Anna | Anna Olin (Anna Olin) | Actor | 1919 | 1 | |
| Olander, Sigfrid | Sigfrid Olander (Sigfrid Olander) | Actor | 1920 | 1 | |
| Orlandini, Lia | Lia Orlandini (Lia Orlandini) | Actor | 1921 - 1922 | 5 | |
| Otáhalová, Lída | Lída Otáhalová (Lída Otáhalová) | Actor | 1922 | 1 | |
| Olson, Jonas | Jonas Olson (Jonas Olson) | Actor | 1922 | 1 | |
| Opøien, Lydia | Lydia Opøien (Lydia Opøien) | Actor | 1923 - 2006 | 13 | |
| Ono, Miyakichi | Miyakichi Ono | Actor | 1925 | 1 | |
| Owen, Reginald | Reginald Owen | Actor | 1926 - 1932 | 2 | |
| Ospenskaya, Maria | Maria Ospenskaya | Actor | 1932 | 1 | |
| Osipovič, Jakov | Jakov Osipovič | Actor | 1926 | 1 | |
| Orlamundt, Kai | Kai Orlamundt | Actor | 1926 | 1 | |
| Osborne, Eunice | Eunice Osborne | Actor | 1926 | 1 | |
| Olsen, Moroni | Moroni Olsen | Actor | 1927 | 1 | |
| Olland, Bill | Bill Olland | Actor | 1976 | 1 | |
| Oesterhelt, Ingrid | Ingrid Oesterhelt | Actor | 1973 | 1 | |
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